Engraving machine



Sept. 13, 1927.

E. POMPLUM ET AL.

ENGRAVING MACHINE EM/L POMPL UM Filed July 31, 1924 WALTER JENNERJ/IH INVENTOR ATTORNEY Patented Sept. 13, 1927'.

UNITED STATES- amass PATENT 'FF!.E.:

EMIL POMPLD'M AND WALTER JEnNEnJAnn, or CUDAHY, Wisconsin, ASSIGNORS 'roTHE FISK RUBBER COMPANY, or onroornn FALLS, MASSACHUSETTS, A CORPORA-'IION OF MASSACHUSETTS.

" Application filed July 31,

Our invention relates to machines for engraving designs on molds orsimilar articles and more particularly to a means for automaticallypositioning the article to be engraved so that the same arrangement orspacing of the component-parts ofthe matter to be engraved .may berepeated on a succession of articles in an accurate and 8X- pedit-iousmanner. A further objectisto provide means of this character which shallpermit duplication of the article at a subsequent date without againlaying out and spacing the matter to be engraved by actual measurements;I

With these and other objects in view our invention comprises thestructure illustrated in the accompanying drawings. described in thefollowing specification and specifically set forth in the appendedclaims, including such modifications thereof as will be obvious to thoseskilled in the art to which the invention appertains. p

In the accompanying drawings Figure 1 is a vertical section tl'n'ough aportion of an engraving machine, equipped with our invention,

Figure 2 is a plan view of the structure shown in Figure 1.

Figure 3 is a side elevation .on an enlarged scale of the secondcylinder of our device, and

Figure 4 is a. section onthe line 44 of V Figure 2, also on an enlargedscale.

For the purpose of illustration we have shown our invention as appliedto the cut ting of brands or trademarks in tire molds, and in thedrawings 1 designates the central post of a conventional mold engravingmachine. A base member 2 mounted on post 1 rotatably supports a moldreceiving table 3. Ball bearings 4 or other anti-friction devices may beinserted between the base 2 and table 3. Any suitable means may beprovided torrotat-ing' the table. An arm 5 is secured at 6 to a bracket7 fastened to the under side of base member 2 by bolts 8. Arm 5 isprovided with bearings 10 and 11 which support a' ENGRAVING MACHINE.

1924. Serial NO. 729,312.

block 22 provided with plunger 23 carry-i ing a pin 24 adapted to ridein groove 18. The plunger 23 isurged toward the cylinder 17by a spring26, and is provided at its a I outer end with ahead 28 by which it maybe retracted: I p

As will be. obvious shaft. 12 and record cylinder 17 will rotate astable 3 carrying 'mold 30 rotates, and pin 24 will travel along themoldsuch as is indicated at 34 in Figure 2. The cylinderthereforeconstitutes a'record of the layout of the matter engraved andmay be filed for future use.

The engraving tool indicated at 36 is operated from suitable patterns inany conventional manner and any suitable means may be provided forrotating table 3.

The operation is as follows. The proper record cylinderl'? is positionedon shaft 12 and secured by nut 15 and, with a mold positioned on table3, 3111 24 is started at the beginning of groove 18. The table 3 is thenrotated until pin 24 drops into the firstrecess 32 arresting furthermovement of the table. The character represented by the recess is thenengraved, pin 24 retracted by head 28 and the table 3 further rotateduntil again stopped by the pin engaging in the duplication of anyengraving as required at any time. By our invention it is also possibleto engrave'all of the occurrences of a given letter (such as the Es forexample) in succession, thereby avoiding changes of the patterncontrolling the engraver 36. To accomplish this it is only necessary tohold pin 24 retracted until the recess indlcatmg the desired characterapproaches whenthe pin is released to seat therein. As is obvious

